Dead-time effects on the voltage spectrum of a PWM inverter
An inverter converts a direct-current power supply to an alternating-current power supply. This con- version is achieved by switching the output between the inputs at high frequency. The resulting output voltage may be described by a high-frequency train of variable-width pulses. Pulse widths are sl...
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| Format: | Article |
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Oxford University Press
2014
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| Online Access: | https://eprints.nottingham.ac.uk/32719/ |
| _version_ | 1848794475129733120 |
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| author | Moore, David C. Odavic, Milijana Cox, Stephen M. |
| author_facet | Moore, David C. Odavic, Milijana Cox, Stephen M. |
| author_sort | Moore, David C. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | An inverter converts a direct-current power supply to an alternating-current power supply. This con- version is achieved by switching the output between the inputs at high frequency. The resulting output voltage may be described by a high-frequency train of variable-width pulses. Pulse widths are slowly modulated so that this output waveform contains a prescribed low-frequency component, which may then be isolated by an appropriate filtering regime. Techniques for determining the full harmonic spec- trum of input and output voltages and currents are well established, at least for an idealised mathematical model of the inverter. However, this model assumes that changes of inverter configuration can be ef- fected instantaneously, which is not quite the case in practice. In fact, a small amount of dead time must be incorporated into switching regimes in order to avoid short circuits of the input. Although dead time is an important feature of real power conversion devices, its effects on output voltage spectra have not previously been fully determined (except by imposing rather restrictive approximations). This situation is remedied in the present paper, in which we present closed-form expressions for the coefficients of the harmonic spectrum, corroborated by simulations. |
| first_indexed | 2025-11-14T19:16:47Z |
| format | Article |
| id | nottingham-32719 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:16:47Z |
| publishDate | 2014 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-327192020-05-04T20:17:18Z https://eprints.nottingham.ac.uk/32719/ Dead-time effects on the voltage spectrum of a PWM inverter Moore, David C. Odavic, Milijana Cox, Stephen M. An inverter converts a direct-current power supply to an alternating-current power supply. This con- version is achieved by switching the output between the inputs at high frequency. The resulting output voltage may be described by a high-frequency train of variable-width pulses. Pulse widths are slowly modulated so that this output waveform contains a prescribed low-frequency component, which may then be isolated by an appropriate filtering regime. Techniques for determining the full harmonic spec- trum of input and output voltages and currents are well established, at least for an idealised mathematical model of the inverter. However, this model assumes that changes of inverter configuration can be ef- fected instantaneously, which is not quite the case in practice. In fact, a small amount of dead time must be incorporated into switching regimes in order to avoid short circuits of the input. Although dead time is an important feature of real power conversion devices, its effects on output voltage spectra have not previously been fully determined (except by imposing rather restrictive approximations). This situation is remedied in the present paper, in which we present closed-form expressions for the coefficients of the harmonic spectrum, corroborated by simulations. Oxford University Press 2014 Article PeerReviewed Moore, David C., Odavic, Milijana and Cox, Stephen M. (2014) Dead-time effects on the voltage spectrum of a PWM inverter. IMA Journal of Applied Mathematics, 79 (6). pp. 1061-1076. ISSN 1464-3634 power inverter; Fourier spectrum; harmonics; dead time http://imamat.oxfordjournals.org/content/79/6/1061.abstract?sid=a181544d-07fb-4bc7-93bb-88d14b950008 10.1093/imamat/hxt006 10.1093/imamat/hxt006 10.1093/imamat/hxt006 |
| spellingShingle | power inverter; Fourier spectrum; harmonics; dead time Moore, David C. Odavic, Milijana Cox, Stephen M. Dead-time effects on the voltage spectrum of a PWM inverter |
| title | Dead-time effects on the voltage spectrum of a PWM inverter |
| title_full | Dead-time effects on the voltage spectrum of a PWM inverter |
| title_fullStr | Dead-time effects on the voltage spectrum of a PWM inverter |
| title_full_unstemmed | Dead-time effects on the voltage spectrum of a PWM inverter |
| title_short | Dead-time effects on the voltage spectrum of a PWM inverter |
| title_sort | dead-time effects on the voltage spectrum of a pwm inverter |
| topic | power inverter; Fourier spectrum; harmonics; dead time |
| url | https://eprints.nottingham.ac.uk/32719/ https://eprints.nottingham.ac.uk/32719/ https://eprints.nottingham.ac.uk/32719/ |